Calculating machine



Sept. 26, 1933. H, MIXER CALCULATING mcunw Original Filed March 22, 1927 4 Sheets-Sheet l $51 alien 24 Sept. 26, 1933. H. P. MIXER CALCULATING- MACHINE Original Filed March 22, 1927 4 Sheets-Sheet 2 M vwautoz Sept. 26, 1933. H. P. MIXER 1,927,873

CALCULATING MACHINE Original Filed March 22, 1927 4 Sheets-Sheet 3 Java. Z

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UPPER 7'6 COUNTER BOTH COUNTE LOWER COUNTER W Snvzmtoz H. P. MIXEVR 1,927,878

CALCULATING MACHINE Sept. 26, 1933.

Original Filed March 22, 1927 4 Sheets-Sheet 4 INVENTOR fl fd Mixer.

Q ATTOKNEJ' Patented Sept. 2 1933 PATENT OFFICE 1,927,873 car-commie momma 11mm r. Mixer, Frankfort, N. 1., w

Gardner Company, Ebensburg, Pa., a corporation of Delaware Qriginal application March 22, 1927, Serial No. 177,357. Divided and this application October 29, 1930. Serial No. 491,873

6 Claims. (01. 235 -60) This invention relates to calculating machines having special reference to improvements in certain details of the calculating machine of Cylde Gardner, disclosed in U. S. Patent No. 1,867,002,

5 issued July 12, 1932, the present application being a division of my application Serial No. 177,357, filed March 22, 1927, and issued as Patent No. 1,833,467, on November 24, 1931.

In the apparatus asdescribed in the abovementioned Gardner patent two accumulator mechanisms were disclosed, one of which could be brought into operative relation with the differential actuator mechanism controlled by the numeral keys when one accumulator key was depressed while the other could be brought into operation when a. second accumulator key was depressed. Also both accumulators could be brought into operation, simultaneously by the depression of a third accumulator key. To determine the sign character of the registration upon the operative accumulator or accumulators, a key was provided upon the depression of which the actuation of the differential mechanism would I cause addition, and a second key when depressed would cause subtraction.

An important object of the invention is to provide an additional accumulator key which is preferably denominated the add-subtract key, which, when actuated, will operate certain connecting mechanism, whereby the sign character of the registration on one of the accumulators will be reversed, so that addition will occur on the upper accumulator while subtraction will occur on the lower accumulator or vice versa.

, Another important object of the present invention is to provide a device whereby a symbol or character will be caused to print in rear of items run into the machine when (a) the add subtract key has been depressed in conjunction '40 with the add key (b) when the add subtract key has been depressed in conjunction with the subtract key (c) when the both accumulator key has been depressed in conjunction with the add key and (d) when the both accumulator key has been depressed in conjunction with the subtract key.

Other objects of the invention will be developed in the course of the detailed description, this detailed description being largely confined to the 0 particular features of the improvements specifically claimed.

In the accompanying drawings like characters of reference indicate like parts in the several views and, as far as is practical the same reference characters have been used in this application as were used in the aforesaid Gardner patent, so

that the present invention may be more clearly understood. In these drawings:

Fig. 1 is a side elevation showing the addsubtract mechanism.

Fig. 2 is a similar view, with parts removed.

Fig. 3 is a detail view of the accumulator control cams and associated parts.

Fig. 4 is a similar view, the cams being shown as rotated approximately 180 degrees.

Fig. 5 is a detail side view of the sign printing control mechanism as seen from the opposite side to Fig. 1.

Fig. 6 is a fragmentary front elevation of the mechanism shown in Figs. 1 and 2.

Fig. '7 is a fragmentary top plan view of part of the keyboard.

Fig. 8 is a detail side elevation of the segment reciprocating means. I

Fig. 9 is a detail side elevation of the means for timing the cam movement with relation to the movements of the segments.

According to the disclosure of Patent 1,867,002, a rock shaft 301 (Fig. 8) is provided with cam means 3I8 for governing the movement of a spring tensioned rocker frame 616, mounted on shaft 608, frame 616 carrying a series of dogs 617 normally engaged by studs 659 of the levers 610. As shaft 301 is rotated forwardly, frame 616 will be rocked, and any of the levers 610 whichhave been released by the depression of digit keys will be allowed to rotate, under the influence of their springs, until they are stopped by contact with the stems of the keys. Upon rearward rotation of shaft 301, the dogs 617 will return the operated levers 610 to normal position. This excursion of the levers 610 serves to register amounts set in the keyboard upon one or more accumulators and to set up a similar amount on the printing line of the type bars. 95

The accumulator shafts 403 and 4030 are slidably mounted in slots of frame plates 410 (Fig. 6), and when either or both of the accumulators are set to active position, the gears 472 thereof are 100 brought into mesh with the racks of the levers I 610, where they are held against spring tension exerted on shaft 403 and 4030, by a rocking cam plate 419, engaging said shaft.

The cam plate 419 has connection through link 105 321 (Fig. 9) with an arm 322 of a rocker device 325, provided with two cam followers adjustable by key-set control devices to different positions relative to cam arms 316 and 320, respectively, of rock shaft 301.

Normally these control devices are set to provide for additive registration, wherein upon operation of the machine the accumulator shafts 403 and 4030 will be moved away from the racks of levers 610 before said racks are allowed to move, and will be moved to reengage the gears 472 while the racks lie in the extreme positions permitted by the keys. As shaft 301 is returned, and the racks allowed to rise, the value set in the keyboard will be additively transferred to the register.

With the accumulator control keys in raised position, however, control cams 440 and 4340 lie with their low portions adjacent to the cam faces of plate 419 as shown in Fig. 4, so that the action of said plate is not suflicient to engage the accumulators with their racks. The cams 440 and 4340 are fast upon the accumulator supporting shafts 403 and 4030, upon universally driven extensions 404 and 404 of which shafts are fixed pinions 474 (Figs. 1 and 2), each pinion engaging rack teeth of a related slide plate 416 or 417, normally held in upper position by a spring 482.

The lower accumulator control key 217 overlies plate 417, and thereby, upon depression, rotates shafts 404* and 408 and turns cam 440 so that its high portion lies adjacent to the cam face of plate 419, and the lower accumulator gears will be moved out of and into mesh with their segment racks as cam plate 419 is rocked. The upper accumulator control key 217 lies above plate 416 and adjusts cam 4340 of the upper accumulator in similar manner. Both accumulator key 217 overlies both plates, 416 and 417, and sets both accumulators to active position. The stems of the three keys 217 217 and 217 are provided with slots, engaging studs fixed in the frame of the machine, to limit the key movement.

According to the present invention, an addsubtract key 2170 is arranged just above the accumulator control keys, on the lower left hand corner of the machine, Figs. 1, 2 and 7. This key is provided with slot 2170 wherein is a suitable stud to limit the movement of the key. The lower end of the stem of this key engages a lug 4162, 1 and 2, formed on the plate 416 and since the slot 2170 is of considerably greater length than the slots in the keys 217 217 and 217, Fig. 2, complete depression of the key 2170 will cause considerably greater downward movement of the plate 416, with the result that the gear 474 which actuates the upper accumulator control cam will be rotated to move the cam to a different angular position.

During this movement, a shoulder 416' of plate 416 will contact with a shoulder 417 of plate 417, operating the latter plate, an interval between the normal position of shoulders 416' and 417" providing for lost motion, so that lower accumulator cam440willbesettothesamepontionbykey 2170 as by key 217 or 217 The add-subtract control m. cooperating with key 2170, includes an auxiliary cam 421, pivoted upon frame 410 and having a slot engaged by a pin 4590 of cam plate 419, this pin and slot connection providing that, as the cam surfaces of plate 419 are moved upward out of the active or contacting position illustrated in Figs. 8, 4, 8 and 9, auxiliary cam 421 will be moved into active position, and vice versa.

The previously described upper accumulator control cm 4840', in the present construction forms part of a double cam 4340, the part 4340! being in alignment with the cam plate 419 and the portion 4340' being in line with the auxiliary cam 421.

The three positions of cam 4340 are as follows: With accumulator control keys 217 217 and 2170 in raised position, both cam portions 4340 and 4340 present a low portion to cams 421 and 419, respectively, and the upper accumulator is inactive. With key 217 or 217 depressed, 80 cam portion 4340 presents a low portion to cam 421 and portion 4340 a high portion to cam 419,

the upper accumulator being operated similarly to the lower accumulator (additively, for instance). With key 2170 depressed, cam portion 4340 presents a high portion to cam 421 and portion 4340 2. low portion to cam 419, the upper accumulator being thrown into and out of mesh with the racks as the lower accumulator is thrown out of and into mesh, respectively.

Therefore, with the add-subtract key 2170 set in depressed position, one accumulator will be active upon the forward and one accumulator upon the return movement of the racks, so that the registrations will be of opposite sign. 5

As previously stated depression of the key 2170 also brings the lower accumulator into operative position, so that it will be apparent that the addsubtract key brings both registers into operation so that they will be turned in opposite directions, one additively and the other subtractively, while the both-accumulator key, when depressed will bring both registers into operation to be operated in unison in a single direction.

Considering that part of this invention which is an improvement in the character printing. Figs. 1 and 5 will be referred to. As explained in the Gardnerv patent, a spring tensioned type bar 611 holding the character type tends upon operation of the machine to move upward. The 0 extent of this movement is controlled through the stud 6512 in the arm 610 of the symbol type bar, stud 6512 cooperating with the index arm 225, Fig. 5, which has several steps, each one allowing more forward travel to the stud 6512 than the step before it.

In this improvement two index arms have been employed, 225 and 2250, oscillating on the stud 2604 which is fixed in end plate 211. The index arm 225 differs from the corresponding one in said Gardner patent in that it has a tail-like portion added to it which has a camming surface as at 225 in Fig. 5. The index arm 2250 is new in my improved mechanism and has two steps or indexing surfaces shown at 2250* and 2250 and a camming surface at 2250'. Through the rear end of the keyboard extends a shaft 207 which rotates in the end plates 211, and on the right-hand endof this shaft 207 is iixed by a set screw 261, an arm 2290 which has a stud 559, 139 this stud contacting with the camming surfaces 2250 and 225 of the index arms to position them. The left end of the shaft 207 is bent in theformofacrankasshowninl'ig. 1,andthe extreme end of the crank at 207' extends through the slot 2282 of the arm 2282 which is offset and is fixed to the arm 2280.

The arm 2280 oscillates on a stud 258 which is held in the end plate 211. This arm 2280 has a surface at 228 which comes in contact with a stud 2670 in the both-accumulator key. The arm2280alsohasacammingsurfaceasat 228' which is in the form of an ear bent at the correct angle to work in conjunction with the stud 2671 which is m the add-subtract key. when the add-subtract key is depressed the stud 2671 is carried downward and as it comes in contact with the ear 228' it carries it downward also thereby causing the arm 2280 to turn on its stud and travel in a clockwise direction. at the same time carrying the arm 2282 in an upward direction, which turns the shaft 207 through its crank at 207 in the slot 2282. The shaft 207 in turning changes the position of the arm 2290, Fig. 5, and as the stud 559 engages with the index arms at 2250 and 225 it allows 2250 to drop into an operative position through gravity and carries the part 225 upward to an idle position.

When arm 2250 drops to active position, it is differentially adjusted in accordance with the setting of the machine for addition or subtraction, by means of the known add key 2177 or subtract key 2174. The subtract key is adapted to be latched in depressed position, as shown in Fig. 5, a rearward extension of the key stem normally engaging a surface 225 of arm 225 to hold the latter with itssecond step, 225 opposite stud 6512. In like manner when arm 2250 is released by the add-subtract or by the both accumulator key, a surface 2250 will hold said arm with its second step, 2250 opposite the stud. Depression of the add key 2177 serves to release the depressed subtract key, so that its rearward extension is lifted out of the path of arms 225 and 2250, so that the first step, 225 or 2250 will cooperate with stud 6512.

When the add-subtract key is released the parts just described return to their former position and the index arms change positions.

Upon depression of the both-accumulator key the same operation occurs and the same parts are positioned by the stud 2670, Fig. 1, the bothaccumulator key coming in contact with the arm 2280 at the point 228 and carrying the arm 2280 downward to the same position as does the stud 2671, the distinction on the recording tape between the two keys being taken care of by the two color ribbon as the both-accumulator key prints in black and the add-subtract prints in red.

I claim 1. In a calculating machine, an accumulator shaft, an accumulator gear mounted on said shaft, a reciprocatory segment with which said gear is adapted to mesh, an accumulator control cam mounted on said shaft, a cam device engaging the first cam, said first cam being adjusted upon rotation of the accumulator shaft to throw the accumulator gear toward the segment, the

second cam device being operable to permit disengagement of the accumulator gear from the segment during the movement thereof in one direction and to force the adjusted accumulator gear into said engagement during movement in the opposite direction, a key having operative connection with the accumulator shaft to rotate said first cam, a limiting stop controlling the movement of the first key, a second key controlling the operative connection between the shaft and first key, and a limiting stop controlling the second key so arranged that the depression of said second key will rot-ate said cam further than the depression of the first key.

2. In a calculating machine, an accumulator shaft, an accumulator gear mounted on said shaft, a reciprocatory segment with which said gear is adapted to mesh, an accumulator control cam mounted on said shaft, a cam device engaging the first cam, said first cam being adjusted upon rotation of the accumulator shaft to throw the accumulator gear toward the segment, the second cam device being operable to permit disengagement of the accumulator gear from the segment during the movement thereof in one direction and to force the adjusted accumulator gear into said engagement during movement in the opposite direction, a key, means for limiting the movement of said key, a rack bar actuated by said key, a gear on the shaft meshing with the rack bar, said rack bar having movement independently of the key, a second key also adapted to move the rack bar, and limiting means to control the extent of movement' of the second key, the limiting means for the second key permitting greater movement of the rack bar than that afforded by the first key.

3. In a calculating machine having a plurality of accumulators; two oppositely acting differential plus-minus registration control members, means settable to render one of said members active with respect to one of said accumulators. means selectively settable to render one or the other member active with respect to a second accumulator, and a key common to both said settable means.

4. In a calculating machine having a plurality of accumulators and reciprocatory actuating racks therefor; two oppositely acting reversible control members adapted to connect and disconnect the accumulators from the racks upon al-- ternate strokes thereof, means settable to render one of said members active with respect to one ofsaid accumulators, means selectively settable to render one or the other member active with respect to a second accumulator, and a key common to both said settable means.

5. In a calculating machine having a plurality of accumulators; means for selectively controlling the sign character of the registration on said accumulators, means including keys for determining like or unlike registration on said accumulators, a symbol type bar, means for selectively adjusting said type bar including a normally active control member, a normally inactive control member, and means operablev by said keys for disabling the active and enabling the inactive control member, and a key common to the sign character control and to the type bar adjusting means and operable to modify the adjustment of either active control member.

6. In a calculating machine, an accumulator shaft, an accumulator gear mounted on said shaft, a reciprocatory segment with which said gear is adapted to mesh, an accumulator control cam mounted on said shaft, a cam device engaging the first cam, said first cam being adjusted upon rotation of the accumulator shaft to throw the accumulator gear toward the segment, the second cam device being operable to permit disengagement of the accumulator gear from the segment during the movement thereof in one direction and to force the adjusted accumulator gear into said engagement during movement in the opposite direction, a key having operative connection with the accumulator shaft to rotate said first cam, and a second key cooperating with the same operating connections to rotate said cam further than said first key.

HAROLD P. MXER. 

